AM625: AM625 EMMC partitioning from u-boot.

Hello,
software-dl.ti.com/.../UG-Memory.html
did you run all cmds as listed in sequence?
Best,
-Hong

yes i am fallowing all the commands in sequence. I am not seeing two partions with mmc part command.      

Am62xx based custom board is already having one rootfs image. 

Hong,

Can you provide me any reference  i.e e2e forum/link that provides some sample commands to do so.

Regards,

Siva.

Hi Hong,

please help me on

How to update/expand dfu_alt_info_emmc env variable as per my current partition schema.

Regards,

Siva.

Hong,

I did below changes in "include/configs/am62x_evm.h" file.

 /* Linux partitions */ \
        "uuid_disk=${uuid_gpt_disk};" \
        "name=boot,size=100Mib,bootable,uuid=${uuid_gpt_boot};" \
        "name=rootfs_A,size=2000Mib,uuid=${uuid_gpt_rootfs_A};" \
        "name=rootfs_B,size=2000Mib,uuid=${uuid_gpt_rootfs_B};" \
        "name=Upgrade,size=0,uuid=${uuid_gpt_Up};" \

in  configs/am62x_evm_a53_defconfig, Added flag CONFIG_RANDOM_UUID=y.

After rebuilding and loading u-boot binaries i can clearly see the updated env variables.

=> gpt write mmc 0 $partitions
Writing GPT: Partition list incomplete
error!

=> printenv uuid_gpt_disk    
uuid_gpt_disk=46c418bb-5012-7f40-ab73-f7c32aa8c29d
=> printenv uuid_gpt_rootfs_A
uuid_gpt_rootfs_A=49755608-dd92-9540-b380-d95e542d35b7
=> printenv uuid_gpt_rootfs_B
uuid_gpt_rootfs_B=8008da4e-aa2e-f34b-990e-eb43adde2f67
=> printenv uuid_gpt_Up
uuid_gpt_Up=7190bce0-7326-a74d-9a4c-cf36b405d034
=>

please review my changes and let us know what was going wrong.

Hong Guan64 said:

Some customization would be needed for creating multiple partitions within eMMC UDA via "gpt...". Here is one reference.
github.com/.../README.gpt
Please note that "gpt..." is maintained by community, not TI.

We don't have out-of-box examples from TI SDK on your request. You'd carry out customization work for your user case.

Hong,

In  "include/configs/am62x_evm.h" file, mentioned size as -1 in my last partiton. I replaced ';' with '\0'.

/* Linux partitions */ \
        "uuid_disk=${uuid_gpt_disk};" \
        "name=boot,size=100Mib,bootable,uuid=${uuid_gpt_boot};" \
        "name=rootfs_A,size=2000Mib,uuid=${uuid_gpt_rootfs_A};" \
        "name=rootfs_B,size=2000Mib,uuid=${uuid_gpt_rootfs_B};" \
        "name=Upgrade,size=-1,uuid=${uuid_gpt_Up};\0"  

Removed below one as i am getting build error.

-       /* Android partitions */ \
-       "partitions_android=" \
-       "uuid_disk=${uuid_gpt_disk};" \
-       "name=bootloader,start=5M,size=8M,uuid=${uuid_gpt_bootloader};" \
-       "name=tiboot3,start=4M,size=1M,uuid=${uuid_gpt_tiboot3};" \
-       "name=uboot-env,start=13M,size=512K,uuid=${uuid_gpt_env};" \
-       "name=misc,start=13824K,size=512K,uuid=${uuid_gpt_misc};" \
-       "name=boot_a,size=40M,uuid=${uuid_gpt_boot_a};" \
-       "name=boot_b,size=40M,uuid=${uuid_gpt_boot_b};" \
-       "name=dtbo_a,size=8M,uuid=${uuid_gpt_dtbo_a};" \
-       "name=dtbo_b,size=8M,uuid=${uuid_gpt_dtbo_b};" \
-       "name=vbmeta_a,size=64K,uuid=${uuid_gpt_vbmeta_a};" \
-       "name=vbmeta_b,size=64K,uuid=${uuid_gpt_vbmeta_b};" \
-       "name=super,size=4608M,uuid=${uuid_gpt_super};" \
-       "name=metadata,size=16M,uuid=${uuid_gpt_metadata};" \
-       "name=persist,size=32M,uuid=${uuid_gpt_persist};" \
-       "name=userdata,size=-,uuid=${uuid_gpt_userdata}\0"

With this changes i can get the required partition schema.

=> mmc part

Partition Map for MMC device 0  --   Partition Type: EFI

Part    Start LBA       End LBA         Name
        Attributes
        Type GUID
        Partition GUID
  1     0x00000022      0x00032021      "boot"
        attrs:  0x0000000000000004
        type:   ebd0a0a2-b9e5-4433-87c0-68b6b72699c7
        guid:   d9b7d8e1-df34-7746-ac2c-312abec431fb
  2     0x00032022      0x0041a021      "rootfs_A"
        attrs:  0x0000000000000000
        type:   ebd0a0a2-b9e5-4433-87c0-68b6b72699c7
        guid:   9f7b99fe-d45c-6441-9914-05975efd4b84
  3     0x0041a022      0x00802021      "rootfs_B"
        attrs:  0x0000000000000000
        type:   ebd0a0a2-b9e5-4433-87c0-68b6b72699c7
        guid:   f689013d-872a-0347-8362-c581699d379f
  4     0x00802022      0x01d59fde      "Upgrade"
        attrs:  0x0000000000000000
        type:   ebd0a0a2-b9e5-4433-87c0-68b6b72699c7
        guid:   a1c10cf6-17f9-8b4e-b179-7363bfb4f687

Now i want send & write all the binaries to the respective partitons using dfu utility.

How to update below env variable to do so.

printenv dfu_alt_info_mmc
dfu_alt_info=boot part 0 1;rootfs part 0 2;MLO fat 0 1;u-boot.img fat 0 1;uEnv.txt fat 0 1"

Regards,

Siva.

Hello Siva,
You'll need to start with "dfu_alt_info_emmc", and customize it for flashing eMMC via DFU.
Best,
-Hong

Is is it possible to create a fat/ext4 partition from uboot?

In include/environment/ti/k3_dfu.h

#define DFU_ALT_INFO_MMC \
        "dfu_alt_info_mmc=" \
        "boot part 1 1;" \
        "rootfs part 1 2;" \
        "tiboot3.bin fat 1 1;" \
        "tispl.bin fat 1 1;" \
        "u-boot.img fat 1 1;" \
        "uEnv.txt fat 1 1;" \
        "sysfw.itb fat 1 1\0"

can i update the same as per my partiton to DFU_ALT_INFO_MMC

#define DFU_ALT_INFO_MMC \
        "dfu_alt_info_mmc=" \
        "boot part 0 1;" \
        "rootfs_A part 0 2;" \

        "rootfs_B part 0 2;" \       
        "tiboot3.bin fat 0 1;" \
        "tispl.bin fat 0 1;" \
        "u-boot.img fat 0 1;" \
        "uEnv.txt fat 0 1;" \
        "sysfw.itb fat 0 1\0"

I tried this but dfu-util fails. My understanding was created a partition using gpt but not filesystem based.

If not possible, if linux comes up can make it as fat partition atleast at boot up.